The point is, a complete Pi Zero W with case, PS, SD is about $25-$30. NodeMCU in a box with PS might be $15-$20. The savings isn't enough to justify all the things that ESP8266 lacks, performance, memory, OS, programming languages, debugger, stability.

I like ESP8266 and ESP32. For many things, they are an excellent choice. For an MQTT broker, not so much.

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- Sun Aug 13, 2017 12:44 pm#69012
Maybe, but there are more aspects - power consumption for example, and in case of stability - I'm using ESPs in 24/7 devices without problem (longest uptime so far is 358 days and still counting).